The D1M-1B4004 is a 50-termination rear cross-connect panel with bantam jacks. Attributes Color: Black Dimensions (HxWxD): 5.25" x 19" x 8" Mounting: Flush in a 19" rack, using WECO/EIA mounting brackets Terminations: 50 Designation: 1-25 AB Grouped LEDs: Red Jack Type: Bantam Cross-Connects: Wire Wrap / Rear IN/OUT Connections: Wire Wrap / Rear Cable Management: (4) 4.25" x 4" Vertical Jumper Rings, Cable Duct, Horizontal Cable Tray Impedance: 100 Ohms Voltage: -48 vDC Some key features and benefits of the D1M-1B4004 are: Die-cast Bantam jacks are rigorously tested with over 10,000 insertions/withdrawals Superior cable management designed into each panel LEDs flash at both ends of the monitored circuit for 30 seconds Cross-connections are located on the rear of the panel Guarantees reliability, durability, and quality over time Simplifies cable routing and circuit identification for growing and changing networks Quick identification of cross-connected circuits Maximum panel circuit density in a rear cross-connect style